Hi All,
I have a requirement to setup a site to site VPN, my plan was to utilise a L2TP service (From Andrews and Arnold) to enable me to have a static IPv4 to utilise and build a tunnel from our Mikrotik Chateau 5G router to our main site Firewall. I have configured the L2TP client and this is working under Tx but I do not get anything back on Rx, I also cannot pass through as the IP of the L2TP service. I was hoping someone can help me understand what I needed in terms of NAT, Firewall rules etc to make this work and if anyone else had managed to configure this successfully? Config below:
jun/13/2023 15:17:42 by RouterOS 7.8
software id = TMEG-8V56
model = D53G-5HacD2HnD
serial number = xxxxxxxxxx
/interface bridge
add admin-mac=18:FD:74:AB:FB:20 auto-mac=no comment=defconf name=bridge
/interface lte
set [ find default-name=lte1 ] allow-roaming=no band="" nr-band=""
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-b/g/n channel-width=20/40mhz-XX
country="united kingdom" disabled=no distance=indoors frequency=auto
installation=indoor mode=ap-bridge ssid=xxx-xxxxx wireless-protocol=
802.11
set [ find default-name=wlan2 ] band=5ghz-a/n/ac channel-width=
20/40/80mhz-XXXX country="united kingdom" disabled=no distance=indoors
frequency=auto installation=indoor mode=ap-bridge ssid=xxx-xxxxx
wireless-protocol=802.11
/interface l2tp-client
add add-default-route=yes connect-to=xxx.x.x.xx default-route-distance=3
disabled=no max-mtu=1500 name=AA-L2TP user=xxxxxxx
/interface wireguard
add listen-port=13231 mtu=1420 name=remote_admin
/interface list
add comment=defconf name=WAN
add comment=defconf name=LAN
/interface lte apn
set [ find default=yes ] apn=wap.vodafone.co.uk ipv6-interface=lte1
use-network-apn=no
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa-psk,wpa2-psk mode=
dynamic-keys supplicant-identity=MikroTik
add authentication-types=wpa-psk,wpa2-psk mode=dynamic-keys name=profile
supplicant-identity=MikroTik
/interface wireless
add disabled=no mac-address=1A:FD:74:AB:FB:26 master-interface=wlan2 name=
wlan3 security-profile=profile ssid=FA-Guest
add disabled=no mac-address=1A:FD:74:AB:FB:25 master-interface=wlan1 name=
wlan4 security-profile=profile ssid=FA-Guest
/ip hotspot profile
set [ find default=yes ] html-directory=hotspot
/ip pool
add name=dhcp ranges=192.168.88.10-192.168.88.254
/ip dhcp-server
add address-pool=dhcp interface=bridge name=defconf
/interface bridge filter
add action=drop chain=forward in-interface=wlan3
add action=drop chain=forward out-interface=wlan3
add action=drop chain=forward in-interface=wlan4
add action=drop chain=forward out-interface=wlan4
/interface bridge port
add bridge=bridge comment=defconf interface=ether1
add bridge=bridge comment=defconf interface=ether2
add bridge=bridge comment=defconf interface=ether3
add bridge=bridge comment=defconf interface=ether4
add bridge=bridge comment=defconf interface=ether5
add bridge=bridge comment=defconf interface=wlan1
add bridge=bridge comment=defconf interface=wlan2
add bridge=bridge interface=wlan3
add bridge=bridge interface=wlan4
/ip neighbor discovery-settings
set discover-interface-list=LAN
/interface list member
add comment=defconf interface=bridge list=LAN
add comment=defconf interface=lte1 list=WAN
add comment=defconf interface=AA-L2TP list=WAN
/interface wireless access-list
add ap-tx-limit=16 interface=wlan4
add ap-tx-limit=16 interface=wlan3
/ip address
add address=192.168.88.1/24 comment=defconf interface=bridge network=
192.168.88.0
/ip cloud
set ddns-enabled=yes ddns-update-interval=1m
/ip dhcp-server network
add address=192.168.88.0/24 comment=defconf dns-server=192.168.88.1 gateway=
192.168.88.1
/ip dns
set allow-remote-requests=yes
/ip dns static
add address=192.168.88.1 comment=defconf name=router.lan
/ip firewall filter
add action=accept chain=input comment=
"defconf: accept established,related,untracked" connection-state=
established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=
invalid log=yes
add action=accept chain=input comment="defconf: accept ICMP" protocol=icmp
add action=accept chain=input comment=
"defconf: accept to local loopback (for CAPsMAN)" dst-address=127.0.0.1
add action=drop chain=input comment="defconf: drop all not coming from LAN"
in-interface-list=!LAN
add action=accept chain=forward comment="defconf: accept in ipsec policy"
ipsec-policy=in,ipsec
add action=accept chain=forward comment="defconf: accept out ipsec policy"
ipsec-policy=out,ipsec
add action=fasttrack-connection chain=forward comment="defconf: fasttrack"
connection-state=established,related disabled=yes hw-offload=yes
add action=accept chain=forward comment=
"defconf: accept established,related, untracked" connection-state=
established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid"
connection-state=invalid
add action=drop chain=forward comment=
"defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat
connection-state=new in-interface-list=WAN
/ip firewall nat
add action=masquerade chain=srcnat comment="defconf: masquerade"
ipsec-policy=out,none out-interface-list=WAN
/ip route
add disabled=no distance=1 dst-address="" gateway=xx.xxx.xx.xxx
routing-table=*400 suppress-hw-offload=no
/ipv6 firewall address-list
add address=::/128 comment="defconf: unspecified address" list=bad_ipv6
add address=::1/128 comment="defconf: lo" list=bad_ipv6
add address=fec0::/10 comment="defconf: site-local" list=bad_ipv6
add address=::ffff:0.0.0.0/96 comment="defconf: ipv4-mapped" list=bad_ipv6
add address=::/96 comment="defconf: ipv4 compat" list=bad_ipv6
add address=100::/64 comment="defconf: discard only " list=bad_ipv6
add address=2001:db8::/32 comment="defconf: documentation" list=bad_ipv6
add address=2001:10::/28 comment="defconf: ORCHID" list=bad_ipv6
add address=3ffe::/16 comment="defconf: 6bone" list=bad_ipv6
/ipv6 firewall filter
add action=accept chain=input comment=
"defconf: accept established,related,untracked" connection-state=
established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=
invalid
add action=accept chain=input comment="defconf: accept ICMPv6" protocol=
icmpv6
add action=accept chain=input comment="defconf: accept UDP traceroute" port=
33434-33534 protocol=udp
add action=accept chain=input comment=
"defconf: accept DHCPv6-Client prefix delegation." dst-port=546 protocol=
udp src-address=fe80::/10
add action=accept chain=input comment="defconf: accept IKE" dst-port=500,4500
protocol=udp
add action=accept chain=input comment="defconf: accept ipsec AH" protocol=
ipsec-ah
add action=accept chain=input comment="defconf: accept ipsec ESP" protocol=
ipsec-esp
add action=accept chain=input comment=
"defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec
add action=drop chain=input comment=
"defconf: drop everything else not coming from LAN" in-interface-list=
!LAN
add action=accept chain=forward comment=
"defconf: accept established,related,untracked" connection-state=
established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid"
connection-state=invalid
add action=drop chain=forward comment=
"defconf: drop packets with bad src ipv6" src-address-list=bad_ipv6
add action=drop chain=forward comment=
"defconf: drop packets with bad dst ipv6" dst-address-list=bad_ipv6
add action=drop chain=forward comment="defconf: rfc4890 drop hop-limit=1"
hop-limit=equal:1 protocol=icmpv6
add action=accept chain=forward comment="defconf: accept ICMPv6" protocol=
icmpv6
add action=accept chain=forward comment="defconf: accept HIP" protocol=139
add action=accept chain=forward comment="defconf: accept IKE" dst-port=
500,4500 protocol=udp
add action=accept chain=forward comment="defconf: accept ipsec AH" protocol=
ipsec-ah
add action=accept chain=forward comment="defconf: accept ipsec ESP" protocol=
ipsec-esp
add action=accept chain=forward comment=
"defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec
add action=drop chain=forward comment=
"defconf: drop everything else not coming from LAN" in-interface-list=
!LAN
/system clock
set time-zone-name=Europe/London
/system logging
add topics=firewall
/system routerboard mode-button
set enabled=yes on-event=dark-mode
/system script
add comment=defconf dont-require-permissions=no name=dark-mode owner=*sys
policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon
source="\r
\n :if ([system leds settings get all-leds-off] = "never") do={\r
\n /system leds settings set all-leds-off=immediate \r
\n } else={\r
\n /system leds settings set all-leds-off=never \r
\n }\r
\n "
/tool mac-server
set allowed-interface-list=LAN
/tool mac-server mac-winbox
set allowed-interface-list=LAN
Thanks